Research on Landing Impact Attenuation Performance of Lunar Lander

Lunar lander dynamic simulation model is built based on the MSC. Nastran/MSC. Adams softwares,and the simulation model is validated by single-landing-gear-assembly drop test and vehicle structural drop test data in the earth gravity environment. This research focuses on the load at connector between structure and landing gear,acceleration response of structure and buffer working strokes.The results show that the flexibility of lander structure and landing gear have a rather considerable influence on landing performance. Finally,the simulated lander structure in the lander landing dynamic model is substituted by areal lander structure,to perform landing analysis on lunar surface,then lander landing performance difference is achieved by comparing simulated lander ground test with lander soft-landing on lunar surface.